Ludo's user avatar
Ludo's user avatar
Ludo's user avatar
Ludo
  • Member for 6 years, 7 months
  • Last seen this week
53 votes
Accepted

Why did the Lunar Module have such an irregular shape? Didn't it add weight and complexity?

51 votes

During the Space Shuttle Columbia Disaster of 2003, Why Did The Flight Director Say, "Lock the doors."?

46 votes

Why does GPS need the fourth satellite?

34 votes
Accepted

Who developed the mathematics used to correct the trajectory of Apollo 13?

30 votes

Was the Saturn V assembly carried out on the crawler-transporter or on the VAB's ground floor?

27 votes

What will now happen with Hubble?

27 votes

Given small computational resources, how was navigation implemented? (Not samples of old guidance software)

26 votes
Accepted

How did Apollo 15's depressurization work?

23 votes
Accepted

If I wanted to reconstruct an entire Apollo mission's crewed spacecraft trajectories, what are the key sources of historical data I'd look for?

23 votes
Accepted

Why does launching east result in an orbital inclination equal to the latitude of the launch site?

22 votes

Why is JWST Launching from French Guiana?

21 votes
Accepted

Tracking of spacecrafts of the Mercury project

19 votes

How did the Mercury Seven compare in military seniority?

18 votes

Did any Columbia debris continue orbiting Earth?

18 votes
Accepted

Why were two different California airbases (Vandenberg and Edwards) intended for Shuttle launches versus landings?

17 votes
Accepted

Is it possible to refuel the James Webb Space Telescope?

17 votes
Accepted

Would the free return trajectories of Apollo 8 to Apollo 11 have made them reenter Earth's atmosphere?

17 votes
Accepted

Why did each F-1 engine have dual fuel feedlines?

16 votes
Accepted

What barge route did the Saturn S-II take from California to Florida?

15 votes

Does the Voyager team use a wrapper (Fortran(77?) to Python) to transmit current commands?

15 votes
Accepted

Which is more accurate, a Saturn V IU or an iPhone?

14 votes

How does the Saturn V Dynamic Test Stand work?

13 votes

What distance did the Apollo CSM go before turning round to pick up the Lunar module?

13 votes

Why are uncertainties of orbital state vectors provided as covariance matrixes?

12 votes

Why was Redstone Arsenal specifically chosen for post-war rocket development?

12 votes
Accepted

What is the lowest-inclination orbit ever achieved by a US crewed spacecraft?

11 votes
Accepted

Does the "Tennis Racket Theorem" apply to the ISS? Does it rotate around its intermediate (unstable) axis?

9 votes
Accepted

What is the ninth planet on this image from the Voyager Golden Record?

8 votes
Accepted

What is being shown on August 27th from the NOAA ACE satellite?

8 votes

Why do rocket engines use nitrogen actuators to operate the fuel/oxidiser valves instead of electric servos?